:root {
    --tcct-primary: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --tcct-primary-hover: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
    --tcct-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --tcct-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --tcct-bg-card: #ffffff;
    --tcct-border: #e5e7eb;
    --tcct-text-main: #1f2937;
    --tcct-text-muted: #6b7280;
    --tcct-radius: 12px;
    --tcct-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.tcct-wrapper {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--tcct-text-main);
    margin: 20px 0;
    width: 100%;
}

/* Dashboard Grid */
.tcct-dashboard {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    align-items: start;
}

@media (max-width: 968px) {
    .tcct-dashboard {
        grid-template-columns: 1fr;
    }
}

/* Workspace Blocks */
.tcct-workspace, .tcct-card {
    background: var(--tcct-bg-card);
    border: 1px solid var(--tcct-border);
    border-radius: var(--tcct-radius);
    padding: 20px;
    box-shadow: var(--tcct-shadow);
}

/* Toolbar Controls */
.tcct-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.tcct-tools-left, .tcct-tools-right {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Custom Interactive UI Buttons */
.tcct-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease-in-out;
    text-decoration: none;
    line-height: 1.5;
}

.tcct-btn-primary { background: var(--tcct-primary); color: #fff !important; }
.tcct-btn-success { background: var(--tcct-success); color: #fff !important; }
.tcct-btn-danger { background: var(--tcct-danger); color: #fff !important; }

.tcct-btn-secondary {
    background: #f3f4f6;
    color: #374151 !important;
    border: 1px solid #d1d5db;
}
.tcct-btn-secondary:hover { background: #e5e7eb; }

.tcct-btn-icon {
    background: transparent;
    color: var(--tcct-text-muted);
    padding: 8px;
    border-radius: 6px;
    border: 1px solid var(--tcct-border);
}
.tcct-btn-icon:hover:not(:disabled) {
    background: #f3f4f6;
    color: var(--tcct-text-main);
}
.tcct-btn-icon:disabled { opacity: 0.4; cursor: not-allowed; }

.tcct-btn:hover {
    opacity: 0.95;
    transform: translateY(-1px);
}

/* Input Display Workspace */
.tcct-textarea-container {
    width: 100%;
    margin-bottom: 15px;
}

.tcct-wrapper textarea#tcct-main-input {
    width: 100%;
    min-height: 220px;
    padding: 15px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    line-height: 1.6;
    color: #1f2937;
    background-color: #fafafa;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
    resize: vertical;
    transition: border-color 0.2s, background-color 0.2s;
    box-sizing: border-box;
}

.tcct-wrapper textarea#tcct-main-input:focus {
    border-color: #6366f1;
    background-color: #ffffff;
    outline: none;
}

/* Footer Control Elements */
.tcct-action-footer {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--tcct-border);
    padding-bottom: 20px;
    margin-bottom: 20px;
}

/* Toggle Automation Switch Custom Layout */
.tcct-toggle-setting {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--tcct-text-muted);
    margin-left: auto;
}

@media (max-width: 640px) {
    .tcct-toggle-setting { margin-left: 0; width: 100%; }
}

.tcct-switch {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 22px;
}
.tcct-switch input { opacity: 0; width: 0; height: 0; }
.tcct-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #ccc;
    transition: .3s;
    border-radius: 34px;
}
.tcct-slider:before {
    position: absolute;
    content: "";
    height: 14px; width: 14px;
    left: 4px; bottom: 4px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
}
input:checked + .tcct-slider { background: #4f46e5; }
input:checked + .tcct-slider:before { transform: translateX(18px); }

/* Conversion Modes Grid Layout */
.tcct-section-title {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 12px 0;
    color: var(--tcct-text-main);
}

.tcct-conversion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
}

.tcct-case-btn {
    background: #ffffff;
    border: 1px solid #d1d5db;
    padding: 10px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    color: #374151;
}

.tcct-case-btn:hover {
    background: #eeebff;
    border-color: #7c3aed;
    color: #5b21b6;
}

/* Sidebar Information Cards */
.tcct-card { margin-bottom: 20px; }
.tcct-card-title {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--tcct-border);
}

.tcct-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.tcct-stat-item {
    background: #f9fafb;
    border: 1px solid #f3f4f6;
    padding: 10px;
    border-radius: 8px;
    text-align: center;
}

.tcct-stat-val {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: #4f46e5;
}

.tcct-stat-lbl {
    font-size: 11px;
    color: var(--tcct-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tcct-reading-time {
    margin-top: 15px;
    font-size: 13px;
    background: #f0fdf4;
    color: #166534;
    padding: 10px;
    border-radius: 6px;
    text-align: center;
}

/* System Alerts Container */
.tcct-alert-box {
    background-color: #fee2e2;
    border-left: 4px solid #ef4444;
    color: #991b1b;
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: fadeIn 0.3s ease;
}

/* Structural History Log Items */
.tcct-history-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tcct-history-item {
    font-size: 12px;
    padding: 8px;
    border-bottom: 1px dashed var(--tcct-border);
    color: var(--tcct-text-muted);
    display: flex;
    justify-content: space-between;
}
.tcct-history-item:last-child { border: none; }
.tcct-empty-history { font-size: 13px; color: var(--tcct-text-muted); text-align: center; padding: 10px 0; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dark Theme System Injections compatibility layer */
@media (prefers-color-scheme: dark) {
    .tcct-wrapper input[type="checkbox"] { filter: cubic-bezier(0.4, 0, 0.2, 1); }
}